#!/bin/sh
# Pre-commit hook to prevent manual editing of autogenerated validation rules
# This script checks if any rules files have been manually modified

set -eu

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"

# Color codes for output
RED='\033[0;31m'
YELLOW='\033[1;33m'
GREEN='\033[0;32m'
NC='\033[0m' # No Color

# Note: RULES_DIR check removed - not used in this version

# Function to check if a file looks manually edited
check_file_manually_edited() {
  file="$1"

  # Check if file has the autogenerated header
  if ! head -n 5 "$file" | grep -q "DO NOT EDIT MANUALLY"; then
    printf '%b⚠️  SUSPICIOUS: %s missing '\''DO NOT EDIT MANUALLY'\'' header%b\n' "$RED" "$file" "$NC"
    return 1
  fi

  # Check if file has generator version
  if ! grep -q "Generated by update-validators.py" "$file"; then
    printf '%b⚠️  SUSPICIOUS: %s missing generator attribution%b\n' "$RED" "$file" "$NC"
    return 1
  fi

  return 0
}

# Function to check if rules are up-to-date
check_rules_up_to_date() {
  printf '%b🔍 Checking if validation rules are up-to-date...%b\n' "$YELLOW" "$NC"

  # Run the update script in dry-run mode
  if cd "$PROJECT_ROOT" && python3 validate-inputs/scripts/update-validators.py --dry-run >/dev/null 2>&1; then
    printf '%b✅ Validation rules are up-to-date%b\n' "$GREEN" "$NC"
    return 0
  else
    printf '%b❌ Validation rules are out-of-date%b\n' "$RED" "$NC"
    printf '%b💡 Run '\''make update-validators'\'' to regenerate rules%b\n' "$YELLOW" "$NC"
    return 1
  fi
}

# Main check function
main() {
  exit_code=0
  files_checked=0

  printf '%b🛡️  Checking autogenerated validation rules...%b\n' "$YELLOW" "$NC"

  # Check all rules.yml files in action directories
  # Store find results in a temp file to avoid subshell
  tmpfile=$(mktemp)
  find "$PROJECT_ROOT" -path "*/rules.yml" -type f 2>/dev/null > "$tmpfile"

  while IFS= read -r file; do
    if [ -f "$file" ]; then
      files_checked=$((files_checked + 1))
      if ! check_file_manually_edited "$file"; then
        exit_code=1
      fi
    fi
  done < "$tmpfile"

  rm -f "$tmpfile"

  if [ "$files_checked" -eq 0 ]; then
    printf '%b⚠️  No validation rule files found%b\n' "$YELLOW" "$NC"
    return 0
  fi

  # Check if rules are up-to-date
  if ! check_rules_up_to_date; then
    exit_code=1
  fi

  if [ "$exit_code" -eq 0 ]; then
    printf '%b✅ All %d validation rules look properly autogenerated%b\n' "$GREEN" "$files_checked" "$NC"
  else
    printf "\n"
    printf '%b❌ VALIDATION RULES CHECK FAILED%b\n' "$RED" "$NC"
    printf '%b📋 To fix these issues:%b\n' "$YELLOW" "$NC"
    printf "   1. Revert any manual changes to rules files\n"
    printf "   2. Run 'make update-validators' to regenerate rules\n"
    printf "   3. Modify generator logic in update-validators.py if needed\n"
    printf "\n"
    printf '%b📖 Rules are now stored as rules.yml in each action folder%b\n' "$YELLOW" "$NC"
  fi

  return $exit_code
}

# Run the check
main "$@"